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(ModeL) 2 Sheets-Sheet 1.

A..H. PALM-ER & 0. A. ROLFE.

NON-INTERPERING SIGNAL BOX. No. 264,193. Patented Sept. 12, 1882.

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(Model.) 2 Sheets-Sheet 2. A. H. PALMER & O. A. ROLPE.

NON-INTERFERING SIGNAL BOX.

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AUGUSTUS H. PALMER. AND CHARLES A. ROLFE, OF UTIOA, NEW YORK.

NON-INTERFERING SIGNAL-BOX.

SPECIFICATION forming part of Letters Patent No. 264,193, dated September 12, 1882.

Application filed December 3, 1881. (Model.)

To all whom it may concern Be it known that we, AUGUSTUS ELPALMER and CHARLES A. RoLFE, citizens of the United States, residing at Utiea, in the county of Oneida and State of New York, have invented a new and useful Improvement in Telegraphic Fire-Alarm Apparatus, of which the following is a specification, reference being had to the accompanying drawings.

()ur invention relates to an improvementin that part of telegraphic fire-alarm apparatus which constitutes the mechanism in the signalbox; anditconsistsin the hereinafterdescribed non-interfering attachment whereby after the mechanism for giving asignal has been set in operation at one box signals cannot be given at other boxes of the system on the same circuit until the signal given from the said one box has been completed.

In the drawings, (two sheets,) Figure 1 is a front View of mechanism employed in a signalbox and embodying our invention. Fig. 2 is a plan, and Fig. 3 a side view, of the same.

Figs. 4, 5, and 6 are respectively side, front, and plan views of details especially illustrative of the non-interfering attachment.

The rear plate, A, and front plate, 13, together with rods or posts a, form the framework for supporting the working parts.

Attached at one end to a shaft, G, is the motive-spring D, the other end being fastened to a fixed standard, I). On the shaft C is a gear, E, the shaft and gear being provided with a ratchet-wheel, c, and a spring and pawl. as in ordinary clock-work, that the spring D may be wound up, without revolving the gear E, by akey placed on the outer and an gularly-shaped end of the shaft 0. There are a pinion, d, on the shaft 0, and a wheel, 0, on an independent stud, both being formed and located, as shown, whereby the properlimit to the number of turns for winding up the spring is determined by the convex partf on the wheel 0 striking the pinion d. There is a pinion, g, fixed on a shaft, F, which engages with the gearE, and is driven thereby.

Fixed on the shaft F is a signal-wheel, G, having projections h. The shaft F has also a worm-gear fastened thereon, which engages with the worm on the shaft 1'. This shaftz' has a ratchet-wheel, j, a verge, is, engaging with the ratchet-wheel and having a balance-arm, l, the purpose of the worm-gear, worm, ratchetwheel, and verge being to regulate the speed of the signal-wheel, as will be readily understood.

A lever, H, formed at the outer end, so as to be swung by the projections 71. on the signalwheel,is pivoted to a stand, which is insulated and connected with one wire, I. Insulated and connected with the other wire, J, is aspring or bearing, on, which a point or projection on the inner end of the lever H strikes to complete the circuit, an insulating-piece, n, being plate B and side of the gear E, having its inner end formed to engage when pressed inward with one of the projections 19 on the gear E. A spring, q, under the upper end of the lever K tends to press this end outward, and hence the lower end and the rod L inward.

Pivoted at r to a stand, M, on the rear plate, A, is a lever, N ,its horizontal part being adapted to be pulled --that is, swung downward by hand-while an arm, s and screw therein is formed and adjusted to press the upper end of the lever K inward. The lever N is still further extended and formed, as shown, to have an arm, 0, which, when the hand-lever N is pulled downward, will rise upward in the direction from a pin, it, in a lever, P, to allow the lever P to swing to the left. The lever P has a pivot-shaft,u, supported in fixed stands, carries the armature Q for the electromagnet It, and has pivoted thereto at its lower end a bar, S. This bar S may slide in a horizontal direction, being guided by a screw, '1), in plate B, and has a projection or plate, T, which will be under the upper end of the lever K when the lever]? and armature are swungto the left away from the magnet, but will be out from under the lever K when the armature is held to the magnet. A spring, 20, fastened at one end to the lever 1?, above the center at which it is pivoted, and the other end to astand fixed on Too plate A, tends to swing the lever P and the armature away from the magnet, and hence to slide the bar S to the left. One of the wires I and J namely, the wire J in this caseforms or includes the coil of the magnet R before it connects with the line-wire.

In operation, before an alarm-is given at each of all the boxes on one and the same circuit the rod L is pressed inward by the spring (1 and lever K, and engages with one of the projections 19, and hence the gear E and signal-wheel G are at rest, and the adjustment of parts is such that the signal-wheel is in the position to have that one of the projections h which has ablunt point or broad face,as shown, under the outer end of the lever H. The Whole electric circuit being thus complete each magnet R will attract and hold its armature, and the projection or plate T will be held away from under the lever K. Hence the lever N may be pulled at any one of the boxes, and the mechanism for giving the alarm at that box be set in motion, since the projection p is re-- of the boxes that no lever, N, can be pulled to give an alarm at any of the boxes while an alarm is being given at any one of them-that is, while the signal-wheel at any one box is revolving.

We claim as our invention- 1. The combination of magnet R, armature Q, lever P, spring 20, and sliding bar S, bearing a stop or plate, T, substantially as and for the purpose set forth.

2. The combination of lever K and sliding bar S, bearing a plate or stop, T, and operated. by an electro-magnet and its armature, substantially as and for the purpose set forth.

3. The'combination of levers N, P, andK and bar S, having a plate or stop, T, substantially as set forth.

4. The'combination of a signal-wheel having projections one of which has a broader face than one or more of the others, mechanism for operating said signaLWheel, lever for making and breaking the circuit and operated by said signal-wheel, an electromagnet, and a plate or stop, T, connected with and operated by means of the armature of said magnet, all substantially as and for the purpose set forth.

AUGUSTUS H. PALMER. CHARLES A. ROLFE.

Witnesses:

LEVI N. ARTHUR, A. R. BENNETT. 

